| Phone Prefix | Range | Phones Recorded |
|---|---|---|
| (510) 639-50** | (510) 639-5000 - (510) 639-5058 | 2 |
| (510) 639-51** | (510) 639-5111 - (510) 639-5111 | 1 |
| (510) 639-52** | (510) 639-5272 - (510) 639-5272 | 1 |
| (510) 639-53** | (510) 639-5309 - (510) 639-5396 | 34 |
| (510) 639-54** | (510) 639-5401 - (510) 639-5415 | 2 |
| (510) 639-55** | (510) 639-5500 - (510) 639-5599 | 67 |
US Phone Directory: (510) 639-5***
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